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arXiv 2007-02-15 DOI 10.1103/PhysRevLett.98.230501 0 views

Device-independent security of quantum cryptography against collective attacks

Acin, Antonio · Brunner, Nicolas · Gisin, Nicolas · Massar, Serge · Pironio, Stefano · Scarani, Valerio

Original · EN

We present the optimal collective attack on a Quantum Key Distribution (QKD) protocol in the "device-independent" security scenario, where no assumptions are made about the way the QKD devices work or on what quantum system they operate. Our main result is a tight bound on the Holevo information between one of the authorized parties and the eavesdropper, as a function of the amount of violation of a Bell-type inequality.

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